Sub-irrigation channel



FIG. 1 is a perspective view of a top side of the sub-irrigation channel, showing our new design;

FIG. 2 is a top side plan view thereof;

FIG. 3 is a bottom side plan view thereof;

FIG. 4 is a front side view thereof;

FIG. 5 is a rear side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is perspective view of the bottom side thereof. 

CLAIM The ornamental design for a sub-irrigation channel, as shown and described. 